“PEOPLE say my writing has an aphrodisiac effect,” laughed Jay McInerney, “but this is ridiculous.” The acerbic author was at the Montauk Yacht Club, where eye-catching Claire Danes and Hugh Dancy each read a story from his new book, “How It Ended,” divulged they plan to marry in France in September, then closed down the party dirty-dancing to “Nobody Loves You When You’re Down and Out.” Later, 150 bibliophiles dressed in white for a dinner hosted by the Accompanied Literary Society’s Brooke Geahan in a compound of fantasy cottages built by impresario Florenz Ziegfeld to house his three mistresses during Prohibition. “He was a forerunner of Berlusconi,” noted one wit. The Gatsby-esque ambience included clouds of cigarette smoke as the full moon struggled to peek through the fog. Toasting McInerney were Andrew Farkas, David Margolick, Jay’s wife Anne Hearst, Andres Santo Domingo and his wife Lauren Davis, Richard Turley, Cynthia Rowley, Patrick McMullan, and Nil Erbel, who invited the swells to her nearby Surf Lodge for a nightcap.